You are allowed to place an obstacle on the hex with enemy unit if this unit is adjacent to your unit and you get this
choice in Special Reserve Roll. However, you can't place a roadblock or a hedgehog on the hex with tanks.

I know this is for Special Reserve Roll. Dont have CB here with me, so I can't see exact words in the "What if" part. But here you can place wires on hexes with enemy units if they are adjancent to your unit. Nothing indicates or contra-indicates if you can do it in this campaign and place it to non-adjancent hexes.. So until (if) it will be cleared by someone higher I will stick with this citation.

Fortifications: The Polish player may deploy an extra 3 wire and 1 bunker for both the Hel and Kepa scenarios. These defensive elements can be placed anywhere on the board but not in contiguous adjacent hexes.

That is the reason why we are asking if they can be deployed or not in hexes where already there are enemy units.

If it says "anywhere on the board," it means "anywhere on the board." I'd interpret that to include hexes that enemy units are on.

Even if he wants to deploy a bunker in an artillery hex?

So what you are saying is that he wants to place a "Polish" bunker on a German artillery unit? I am guessing that he wishes to do this so that that arty now has to remain in place?

That raises a few questions. As it is indeed a Polish bunker, does this mean that the German arty does not recieve any defensive benefits from that bunker (as that is usually the case with bunkers). Or does the bunker automatically become a German one after being placed there. Nice thinking outside the box, but a bit too illogical for me.

I can go along with the wire being placed in enemy hexes but the bunker is Polish and meant to directly benefit the Polish side (to provide cover for a Polish unit) and I would say that it should be placed in an empty hex or one with a Polish unit.

If it says "anywhere on the board," it means "anywhere on the board." I'd interpret that to include hexes that enemy units are on.

Even if he wants to deploy a bunker in an artillery hex?

So what you are saying is that he wants to place a "Polish" bunker on a German artillery unit? I am guessing that he wishes to do this so that that arty now has to remain in place?

That raises a few questions. As it is indeed a Polish bunker, does this mean that the German arty does not recieve any defensive benefits from that bunker (as that is usually the case with bunkers). Or does the bunker automatically become a German one after being placed there. Nice thinking outside the box, but a bit too illogical for me.

I can go along with the wire being placed in enemy hexes but the bunker is Polish and meant to directly benefit the Polish side (to provide cover for a Polish unit) and I would say that it should be placed in an empty hex or one with a Polish unit.

Yes, those were some of the questions that came up to my mind when I read some of the answers from some of the fellow members.